Oxyacetylene-torch.



I. G. PETTIS.

'oxYAcETYLENE TORCH.

' APPLICATION FILED DEC. I4. 'I9I6- Patented Jan. 21, 1919.

UNITED srnrrns PATENT oFFIcE. j

JOHN e. PET'IIS, or CHICAGO, ILLINOIS.

oxYAcETYLEN-LTORCH.

To all whom it may concern.'

Be it known that I, JOHN G. PENIS, a

citizen of ythe United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Oxyacetylene-Torches, of which the following is a full, clear,V and ex' act description.

My invention relates to Oxy-acetylene torches, and particularly to the devices l therein for mixing the gases.

The object of my invention is to provide a mixing-head for such torches that is simple and economical in construction and is capable of imparting a spiral.motion to the expelled gases in such manner asto thoroughly mix the same and prevent the ame issuing from the nozzle ofthe torch from flashing back to the point of mixture. This I; accomplish bythe means hereinafter fully explained, and as particularly pointed out in the claims. y

In the drawings:

Figure 1 is a longitudinal central section of an Oxy-acetylenel welding torch embody- 1n my invention.

ig. 2 is a side view of an Oxy-acetylene cutting torch showing the portion thereof inclosmg my invention in section.

Fig. 3 is a transverse section taken on dotted line` 3 3, Fig. 1, drawn to a larger scale.

Fig. 4.- is a central section of the segregated mixing-head'ofA said torch taken on dotted line 4 4, Fig. 3.

vReferring to'the drawings, represents the tubular handle of an Oxy-acetylene weldingtorch, the bore of whichconstitutes a gas-chamber. At its rear end it has a suitable coupling a secured thereto that consists o f a metal casting having a smaller longitudinal passage b and a larger longitudinal passage B therein. Passage b discharges into the bore of ,handle A- near its inner circumference, and passagel B discharges into a longitudinal. ipe e extending centrally through said ore.

The forward end of the tubular handle is screwed into and closed by a mixing-head C.

The rear end 'of this head'is, preferably,

Specication of Letters-Patent. Pate'nted J 3,11, 21, 1919, Application led December 14, 1916. Serial No. 136,830. l

greater in diameter than its forward end and the adjacent end of the' Ahandle is screwed into it, and the forward portion of said head is exteriorly screw-threaded and has the expanded rear end or socket of shank D of a discharge nozzle E screwed over the same until the-forward end of the head comes in contact and forms a as-tight connection with the shoulder resultlng from ,the reduction of the diameter of the bore of` said shank,- substantially as shown in the drawings. a v

The rear end of the reduced bore c of the shank 1is made funnel-shaped, and the center of the forward end of head C is providedwith a conical projection d, the base of which is slightly less than the diameter of the mouth of the lfunnel-shaped end of bore c of the shank into which it extends. Head C is provided with an axial passage c that extends therethrough and discharges from the apex of projection d into the reduced bore c of the shank. The rear end of this passage is connected by pipe e with passage B of coupling a.' j

The front end o head-C is provided with a concentric circular groove f surrounding and connect the tangential grooves with the bore of handle A outside of pipe e.

In operatioma. properly regulated flow say, acetylene gas issues under ressure from passage b of coupling a into t e bore of the andle and from thence' into and through passages G in head C, and a properly reguated flow of,I say, oxygen ,v gas issuesunder fpressure frompassage B of said coupling through pipe einto and through the central passage 7c. It will be borne in mind that the joint between the forward end of head C and the inner shoulder of the rear expanded end of shank D is gas-tight; the gas discharged from the forward ends of ss' y from the apex of the projection to take a spiral course therewith and thoroughly .ing from its front end into the bore of said 'shank and having a concentric circular mixes with the saine as it passes through the bore of and discharges from the nozzle.l

In Fig. 2 of the drawings, I show my iinproved mixing-head in connection with a cutting-torch. The only dilference between head K of this cutting-torch and head C of the welding-torch is that in lthe former the rear end is built higher to form a guide for Ithe comparatively long stretch of valvecontrolled oxygen gas pipe I, which extends from coupling H at the rear end of the torch clear to the nozzle M at the front end thereof outside of the handle and independent of the gas mixing features of the mixing-head.

Having thus. described one embodiment vof my invention, what'I claim and desire to cover by Letters Patent is,

l. An Oxy-acetylene torch comprising a nozzle, a shank therefor, and la mixing head.

having a central conical projection extending from its front end into the bore of saidy shank and having an axial passage therethrough that receives gas from one source and discharges from the apex of said projection, and a longitudinal passage that receives gas from another source and is located between said axial passage and the exterior of said head; said head having a passageway extending from said longitudinal passage tangentially to the base of said projection.

2. An Oxy-acetylene torch comprising a nozzle, a shan-k therefor, and a mixinghead having a central conical projection extending from its front end into the -bore of said shank and having an axial passage therethrough that receives gas from one source a-nd discharges from the apex of said projection, and a longitudinal passage that receives gas from another source and is located between said axial passage land the exterior of said head; said head having a groove in its front end extending from the discharge end of said longitudinal passage tangentially to the base of said projection.

3; An Oxy-acetylene torch comprising a nozzle, a sh-ank therefor, and a mixing-head groove around the base of said projection, an axial passage therethrough that receives gas from one source and discharges from the apex of said projection, and a longitudinal passage that receives gas .from another source and is located between said axial passage and the exterior of said head; said head having a groove in .its front end extending from Athe discharge end of sald longitudinalpassage tangentially to pthe circular groove at the base of said projection.

5. An Oxy-acetylene torch comprising a nozzle, a shank therefor and a mixing-head having a central conical projection extending from its front end into the bore of the shank, and having a concentric circular groove around" the base of saidprojection, an axial passage therethrough that receives gas from one source and discharges from the apex of said projection, and a plurality of equi-distant llongitudinal passages that receive gas' from another source and are located between said axial passage.' and the exterior of said head; said headv having grooves in its front end extending from the discharge ends of said longitudinal grooves tangentially to the circular groove at the base of said projection.

6. An Oxy-acetylene torch comprising a nozzle, a shank therefor having a funneland discharges from the apex of said projection, and a plurality of equi-distant longitudinal passages that receive gas from an-` other source and are located between said axial passage and the exterior of said head; said head having grooves in its front end extending from the discharge ends of 'said longitudinal grooves tangentially to the circular groove at the base of said projection.

7. Anl Oxy-acetylene torch comprising a4 nozzle, a shank therefor having a funnelshaped rear end, and a mixing-head having a central conical projection extending from its front end into the funnel-shaped rear end of the bore of saidshank and having an axial passage therethrough that receives gas from one source and dischargesl from the apex of said projection, and a longitudinal passage that receives gas from another source and is located between said axial In witness whereof I have hereunto set passage and the exterior of said head; said my hand this 21st day of October, 1916. ,head having a groove in its front end eX- i JOHN G. APETTIS.

tending from the discharge end of said Witnessesz.

5 longitudinal passage tangentially to the base FRANK D. THoMAsoN,

- lof said pro]ection. y, FLoRENoE MITCHEIL. 

